In the meantime.. if you would like to learn more about the origins and development of video game music, then look no further than this detailed page over on Wikipedia #EssentialReading
Musicians! Are you an aspiring video game music composer..?
You are? That's great! If you are seeking advice, then look no further than Winifred Phillips' acclaimed (and pretty much unique) book on the topic: "A Composer's Guide to Game Music" (published in 2014).